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A121591 as a simple table

na(n)
11
26
327
498
5315
6912
72456
86210
914937
1034390
1176317
12163896
13342062
14695736
151382880
162691586
175139906
189644622
1917808040
2032393370
2158113312
22102914152
23180062622
24311488920
25533124225
26903324372
271516110165
282521780688
294158863310
306803237280
3111043320922
3217794350786

[1,6,27,98,315,912,2456,6210,14937,34390,76317,
 163896,342062,695736,1382880,2691586,5139906,
 9644622,17808040,32393370,58113312,102914152,
 180062622,311488920,533124225,903324372,
 1516110165,2521780688,4158863310,6803237280,
 11043320922,17794350786]